反应详情

To a cooled solution of 2-iso-propyl aniline (714 mg, 5.28 mmol) in dichloromethane (20 mL) at −50° C. in a dry ice/acetone bath was added a solution of bromine (269 μl, 5.28 mmol) in dichloromethane (5 mL) over 20 min. After completion of the addition, the reaction mixture was stirred for an additional hour. Purification by column chromatography (silica gel, hexane/ethyl acetate) gave 4-bromo-2-iso-propyl-phenylamine as a brown oil (1.53 g, 57%); 1H NMR (300 MHz, DMSO-d6): δ 7.01(m, 2H), 6.55(d, 1H, J=13 Hz), 5.05(bs, 2H), 2.92(m, 1H), 1.11 (d, 6H, J=7 Hz); TLC conditions: Uniplate silica gel, 250 microns; Mobile phase=Hexane/ethyl acetate [10:1]; Rf=0.11

1. additionAfter completion of the addition
2. customPurification by column chromatography (silica gel, hexane/ethyl acetate)